Well, not exactly. Thyroid tests are subject to interpretation, and it takes more than just TSH to arrive at that interpretation.
If you notice, the NACB (mentioned on the second page of the AACE information) believes that TSH above 2.5 is indicative of hypoT in most of the population.
But it's really the measure of the free thyroid hormones in the blood that says more about thyroid health than TSH.
If your free T4 and/or free T3 is at the bottom or below of their lab ranges, you are probably hypothyroid, no matter where your TSH is.

Thanks. My Free T4 was 16 I think, lab range 12-22. Until this year, my Free T4 has been 14, lab range 10-25. It is tough for me, and tougher for doctors, to diagnose me as hypothyroid as long as my results are within normal lab ranges, despite my symptoms. And I don't have the energy to keep going to doctors. I know that this is a terrible attitude but in 2002 I saw 2 docs who both did not think I had hypothyroidism despite my symptoms. It is tiring and since I am not convinced, then how can I convince a doctor?